12-channel combiner-equalizer of UMT production is active device specially designed to combine 12 independent IF carriers (L-band, frequency range of 950-2150 MHz) with power adjustment and AGC for each channel.
12-channel combiner-equalizer has 12 RF inputs for 12 IF carriers and 1 or 2 independent outputs. All inputs and outputs work in L-band. 1st output contains full spectrum combined from 12 inputs and is used for further signal transmitting. The 2d output is used for signal controlling (can be added by request) and has up to 30 dB lower signal power than the 1st input.
12-channel combiner-equalizer can be used in MVDS head-end, professional TV link and TV repeater stations due to its features such as automatic gain control (AGC) which provides high stability of output RF-signal power. The case of the 12-channel combiner-equalizer is designed for using in standard 19″ rack.
12-Channel Combiner-Equalizer is a high-performance active RF device engineered to combine twelve independent L-band IF carriers (950–2150 MHz) into a stable and precisely equalized output. Each of the twelve channels features individual power adjustment and automatic gain control (AGC), ensuring uniform and consistent RF levels regardless of input fluctuations. Built for demanding broadcast environments, it delivers excellent linearity, minimal intermodulation distortion and smooth group delay characteristics required for digital transport streams.
All twelve RF inputs operate in the L-band range, while the unit provides one primary combined output and an optional auxiliary output attenuated by –20 dB for monitoring. This design allows technicians to supervise signals in real time without affecting the main transmission path. The combiner’s robust 19-inch rack-mount chassis and 24/7 operational stability make it suitable for MVDS headends, TV repeater stations and professional RF distribution networks.
✅ High-capacity multi-carrier L-band combining
This model supports simultaneous combining of twelve independent IF carriers, enabling dense RF aggregation in professional MVDS and distribution systems. The wide operating range of 950–2150 MHz ensures compatibility with satellite IF, MVDS uplinks and repeater infrastructures. Its precise design maintains output stability even under heavy multi-carrier loading.
✅ Stabilized output through AGC and independent level control
Each channel features both manual attenuation and AGC, ensuring stable output regardless of variations in source devices. This prevents overload conditions and improves overall distribution quality. By maintaining carrier-level consistency, the device reduces the risk of modulation errors in downstream equipment.
✅ Designed for 24/7 professional broadcasting
Built for continuous operation, the combiner-equalizer ensures reliable long-term performance in mission-critical applications. Low intermodulation distortion and group delay uniformity protect the integrity of digital video signals. Its broadcast-grade hardware platform supports stable operation under varying environmental conditions.
🛠️ The 12-Channel Combiner-Equalizer ensures that each carrier is balanced to maintain optimal spectral uniformity. Its AGC circuitry stabilizes the overall output signal even under variable input power, guaranteeing consistent downstream performance in modulators, transmitters and distribution systems. The low-distortion architecture protects digital modulation quality, minimizing BER degradation and preserving transport stream integrity.
🛒 This device is designed for operators who require high-density RF carrier combining in advanced L-band infrastructures. Offering optional 50Ω N-type or 75Ω F-type connectors, it fits seamlessly into existing systems. Its reliability, refined equalization capabilities and ability to handle twelve carriers make it an exceptional solution for large-scale RF headends.
📌 Key features
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Automatic gain control (AGC)
AGC ensures constant output power by correcting input level fluctuations across all twelve carriers. This enhances reliability in networks with varying modulation sources. It also reduces system downtime by minimizing the need for manual adjustments.
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Independent manual power adjustment
Each input channel can be individually tuned, allowing engineers to equalize multi-source carriers with precision. This is essential for headends where different modulators or receivers produce uneven power levels. Fine control helps achieve optimal spectral flatness.
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Low intermodulation distortion
The internal RF path is optimized to keep IMD extremely low, preserving the clarity and stability of each combined carrier. This ensures high-quality digital modulation transport without unwanted artifacts. It is especially important in multi-carrier MVDS or IF distribution.
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High linearity and stable output power
The combiner maintains linear response even at full 12-channel load, supporting distortion-free digital signals. Stable output power improves downstream modulation fidelity. Its professional-grade linearity ensures predictable system behavior under all conditions.
⚙️ Main functions
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Combining twelve independent L-band IF carriers
The unit merges up to twelve modulated carriers into a single broadband output without degrading spectral integrity. This supports dense RF aggregation for MVDS and headend systems. The auxiliary output provides convenient monitoring with minimal insertion loss.
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Automatic output power stabilization
AGC dynamically adjusts gain to maintain constant output, preventing signal imbalances. This ensures smooth integration with sensitive RF components downstream. It also increases system resilience during fluctuating carrier input scenarios.
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RF signal equalization and conditioning
The device minimizes amplitude and delay variation between channels, preserving BER performance and TS stability. This conditioning is essential for high-density digital broadcasting systems. Engineers benefit from predictable and consistent output characteristics.
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Industrial-grade 24/7 operation
Designed for continuous broadcasting loads, it offers long-term stability and resistance to environmental stress. The professional rackmount enclosure supports reliable heat dissipation. It is ideal for high-duty-cycle installations.
🧩 Applications
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MVDS broadcasting and headend systems
Supports multi-carrier IF combining for MVDS uplinks and distribution networks. Ensures uniform and clean carriers for downstream transmitters. Enhances reliability of long-distance RF delivery.
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Professional TV link and repeater infrastructure
Ideal for equalizing and stabilizing carriers used in repeater and relay stations. Helps maintain consistent signal levels under varied input conditions. Prevents quality degradation during multi-hop transmission.
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Large RF distribution systems (SMATV, CATV, campuses)
Handles dense carrier aggregation for hotels, campuses and residential distribution networks. Ensures stable and distortion-free RF delivery to extended distribution chains. Reduces maintenance by preventing overload and imbalance issues.
💡 Why you should buy from us❓
- 1.5 years warranty
- 7 years after-sales support
- Remote support team of engineers
- Discount program for regular customers 🎁
💬 Contact Us
For additional details or assistance regarding the 12-Channel Combiner-Equalizer, feel free to contact our team. We provide professional consultation and aftersales support to help with installation and setup, ensuring you get the most out of your broadcasting equipment.
